Fit-All Radiator Valve Wheel Handle from Durst Corporation fits all popular valve stems by choosing one of three different size metal inserts included and placing it into a molded square recess in the thermal plastic handle that serves as an insulator from the hot valve body and stem. There is a molded embossed direction arrow pointing clockwise with adjacent word "CLOSE" and another arrow pointing counter-clockwise with word "OPEN" embossed molded into surface of handle. Comes in sealed poly bag.